Add Int8# and Word8#

This is the first step of implementing:
https://github.com/ghc-proposals/ghc-proposals/pull/74

The main highlights/changes:

- `primops.txt.pp` gets two new sections for two new primitive types
  for signed and unsigned 8-bit integers (`Int8#` and `Word8`
  respectively) along with basic arithmetic and comparison
  operations. `PrimRep`/`RuntimeRep` get two new constructors for
  them. All of the primops translate into the existing `MachOP`s.

- For `CmmCall`s the codegen will now zero-extend the values at call
  site (so that they can be moved to the right register) and then
  truncate them back their original width.

- x86 native codegen needed some updates, since it wasn't able to deal
  with the new widths, but all the changes are quite localized. LLVM
  backend seems to just work.

Bumps binary submodule.

Signed-off-by: Michal Terepeta <michal.terepeta@gmail.com>

Test Plan: ./validate with new tests

Reviewers: hvr, goldfire, bgamari, simonmar

Subscribers: Abhiroop, dfeuer, rwbarton, thomie, carter

Differential Revision: https://phabricator.haskell.org/D4475

1 files changed, 8 insertions, 0 deletions

diff --git a/compiler/utils/Binary.hs b/compiler/utils/Binary.hs
index 447317ca47..a38af74efe 100644
--- a/compiler/utils/Binary.hs
+++ b/compiler/utils/Binary.hs
@@ -637,6 +637,10 @@ instance Binary RuntimeRep where
     put_ bh AddrRep         = putByte bh 9
     put_ bh FloatRep        = putByte bh 10
     put_ bh DoubleRep       = putByte bh 11
+#if __GLASGOW_HASKELL__ >= 807
+    put_ bh Int8Rep         = putByte bh 12
+    put_ bh Word8Rep        = putByte bh 13
+#endif
 
     get bh = do
         tag <- getByte bh
@@ -653,6 +657,10 @@ instance Binary RuntimeRep where
           9  -> pure AddrRep
           10 -> pure FloatRep
           11 -> pure DoubleRep
+#if __GLASGOW_HASKELL__ >= 807
+          12 -> pure Int8Rep
+          13 -> pure Word8Rep
+#endif
           _  -> fail "Binary.putRuntimeRep: invalid tag"
 
 instance Binary KindRep where